Difference time between United States of America and French Guiana in hours, minutes, and seconds is [ -1 hours ] with gregorian date today is Saturday 13th of September 2025 in American local time, Where the time now in United States of America is 15:20 PM and the time now in French Guiana is 16:20 PM in French Guianese local time and the time comparison between United States of America and French Guiana in greenwich time ( GMT ) where United States of America late for greenwich time ( GMT -04:00 ) while French Guiana late for greenwich time ( GMT -03:00 ).